The 3-5 september update was a curios one. It acted as a sandbox penalty.
The pages are in google database, but not shown on usual searches.
Ad your site name to the search and the pages will be in the results.
I suspect a "over optimization" penalty, as many sites that were hit that day, were old sites, with steady traffic.
Really, for the moment , the new algo seems broken + this secrecy is not helping.